Fix markup in unittest doc.
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index b130a8b..a698e13 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -1553,8 +1553,8 @@
The :class:`TestLoader` class is used to create test suites from classes and
modules. Normally, there is no need to create an instance of this class; the
:mod:`unittest` module provides an instance that can be shared as
- ``unittest.defaultTestLoader``. Using a subclass or instance, however, allows
- customization of some configurable properties.
+ :data:`unittest.defaultTestLoader`. Using a subclass or instance, however,
+ allows customization of some configurable properties.
:class:`TestLoader` objects have the following methods: